To adapt, he would need to learn about the social hierarchy in the Twilight world. The Cullens are sort of the 'royalty' among the vampires in Forks, and the werewolves have their own pack structure. He could try to find a place within these hierarchies, either by befriending the powerful groups or by creating his own niche. Also, he would need to deal with the fact that humans are often in danger in this world, and he might feel the need to protect them.
He would first have to get used to the presence of vampires and werewolves. This means understanding their rules, like the vampires' need to drink blood and the werewolves' transformation during the full moon. He might also have to adapt to the small - town atmosphere of Forks, which is very different from modern - day big cities.
They can start by observing the new world's culture. Just like when we travel to a new place in our world, the OC can watch how the people interact, what their values are. For example, if the new world values honor above all else, the OC can try to uphold that in their actions.
One possibility is that the male oc is transported right into the middle of a vampire - human conflict. He could be mistaken for a threat or a potential ally. If he has knowledge from the real world about Twilight, he could try to use it to his advantage, like trying to prevent certain events from happening. For example, if he knows about Bella's almost - death experiences, he could try to stop them. This would create a whole new set of interactions with the characters in the Twilight universe.
Percy would first use his combat skills. If he's in a dangerous world, he'll rely on his fighting abilities. He might also try to find allies quickly. After all, he's used to having friends around in his own world.
The reader should first keep calm. Then, try to recall the knowledge about the Avengers from the fanfictions they've read. It'll help them understand the situation better.
Hermione would also try to use her magic to her advantage. For example, if she found herself in a dangerous situation with a vampire or a werewolf, she'd use spells for protection. And she'd probably try to educate the characters in the Twilight world about magic, which could be both confusing and exciting for them.
Well, it could be really exciting. The OC might find themselves in the middle of all the action and drama in the RWBY world. They could form unique relationships with the different characters. Maybe they'd team up with Ruby and her friends against the Grimm. And in the harem aspect, they could have some interesting romantic or friendly interactions with multiple characters, like Weiss, Blake, and Yang.
One idea could be that the OC discovers they have a special power in the new world that is key to saving it from an ancient evil. For example, the power to control time, which is a very cool concept.
They would need to become more aware of their surroundings. Listen for any sounds that might indicate zombies or other threats.
The plot could involve the vampire OC trying to find a place among the different vampire clans in Skyrim. He might face challenges from the Dawnguard, a group dedicated to hunting vampires. He could also form unexpected alliances with other outcasts in Skyrim, like some of the werewolves who also face discrimination. His vampire abilities like enhanced strength and speed would play a big role in his adventures, whether it's in combat or in sneaking around ancient ruins.
He would start by observing. Harry is a curious person, so he'd watch how the local wizards or magic - users in the new world perform magic. He might notice differences in wand movements or incantations right away.